چكيده به لاتين
Experimental and numerical studies on steel shear walls, as well as its performance in past earthquakes, have introduced this system as a system with proper performance against lateral loads. In addition, its ease of operation and its economic aspects make it suitable for many of the world's most important projects. Despite many studies on this system, there are still many unknowns about it. One of these unknowns, which is seen in many experimental tests, has not been investigated, the effect of the crack phenomenon and its propagation on the system's behavior. Due to the complexity of nonlinear analysis of crack analysis, even with the use of finite element software, there are a few research in this regard. On the other hand, due to the low thickness of the steel plate and the inherent of the weld, the presence of cracks in this system is indisputable. Therefore, in this thesis, the effect of probable cracks in the wall corners (horizontal and vertical), as well as cracks in the slits (mid and lateral) were investigated. The results indicate that the midline crack has a more destructive effect on the edge cracks. The presence of long, mid-length trunks causes the system to rupture in the elastic region. Also, comparing the corner cracks shows that the horizontal cracks have a destructive than vertical cracks, and the increase in the initial length of the horizontal cracks causes the system to behave ductile to the brittle behavior that leads to rupture of the wall in the elastic region. In order to achieve the load-displacement curve, a parametric model has been developed. In this model, the effect of the crack and propagation will be considered. Comparison of the results shows the high convergence of the proposed model and the finite element results.
